问题
解答题
计算,能简算的要简算. (0.45-0.45×
|
答案
(1)(0.45-0.45×
)÷45%,1 3
=(0.45-0.45×
)÷0.45,1 3
=(0.45-0.15)÷0.45,
=0.3÷0.45,
=
;2 3
(2)
×7.9+3 8
×10%,3 8
=
×7.9+3 8
×0.1,3 8
=
×(7.9+0.1),3 8
=
×8,3 8
=3.
计算,能简算的要简算. (0.45-0.45×
|
(1)(0.45-0.45×
)÷45%,1 3
=(0.45-0.45×
)÷0.45,1 3
=(0.45-0.15)÷0.45,
=0.3÷0.45,
=
;2 3
(2)
×7.9+3 8
×10%,3 8
=
×7.9+3 8
×0.1,3 8
=
×(7.9+0.1),3 8
=
×8,3 8
=3.